The iPhone 15 Pro Max features a slightly bigger battery than its direct predecessor, the iPhone 14 Pro Max, along with sporting a USB-C, while last year’s model features the Lightning. Despite these differences, Apple’s latest flagship continues to have the same charging speeds, according to multiple tests conducted.
iPhone 15 Pro Max tops out at 25.49W, even with Apple’s 140W charger connected to it
Apple has, once again, limited the iPhone 15 Pro Max’s maximum charging speeds to 25.5W, according to the data gathered by ChargerLAB. This maximum supported wattage is identical to the iPhone 14 Pro Max, which is perplexing to see, as the inclusion of a USB-C port typically means that manufacturers would have greater flexibility in increasing the maximum charge throughput. It is possible the company is limiting the iPhone 15 Pro Max to 25.5W because it wants the battery to degrade at a slower rate.
With the latest iPhone 15 models, the company has also added three new battery features; Optimized Battery Charging, 80% limit, and None, which should help reduce battery wear for an even longer time, though that all depends on which setting you choose. The tests revealed that a multitude of official Apple chargers were used, starting from the 20W power brick right down to the 140W one used to top up a MacBook Pro’s battery. Even though the iPhone 15 Pro Max was compatible with all of them, its charge limit peaked at 25.5W.
The tests also showed that the 6.7-inch handset is compatible with almost all third-party USB-PD chargers, with the Lenovo thinkplus 65W power brick recording the highest wattage delivered to the iPhone 15 Pro Max, which is 26.2W. Three more chargers managed to take that charge level above the 26W threshold, but irrespective of which accessory is used, there is little wiggle room to go beyond this level. You can check out ChargerLAB’s in-depth tests in the video below and let us know if you think Apple should have increased the maximum wattage level.
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